/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.sdk.extensions.sql.meta.provider.datacatalog;



import com.alibaba.fastjson.JSONObject;

import com.google.cloud.datacatalog.Entry;

import com.bff.gaia.unified.sdk.extensions.sql.meta.Table;

import java.net.URI;

import java.util.regex.Matcher;

import java.util.regex.Pattern;



/** Utils to extract BQ-specific entry information. */

class BigQueryUtils {



  private static final Pattern BQ_PATH_PATTERN =

      Pattern.compile(

          "/projects/(?<PROJECT>[^/]+)/datasets/(?<DATASET>[^/]+)/tables/(?<TABLE>[^/]+)");



  static Table.Builder tableBuilder(Entry entry) {

    return Table.builder()

        .location(getLocation(entry))

        .properties(new JSONObject())

        .type("bigquery")

        .comment("");

  }



  private static String getLocation(Entry entry) {

    URI entryName = URI.create(entry.getLinkedResource());

    String bqPath = entryName.getPath();



    Matcher bqPathMatcher = BQ_PATH_PATTERN.matcher(bqPath);

    if (!bqPathMatcher.matches()) {

      throw new IllegalArgumentException(

          "Unsupported format for BigQuery table path: '" + entry.getLinkedResource() + "'");

    }



    String project = bqPathMatcher.group("PROJECT");

    String dataset = bqPathMatcher.group("DATASET");

    String table = bqPathMatcher.group("TABLE");



    return String.format("%s:%s.%s", project, dataset, table);

  }

}